Pac Nu-gm4 Navigation Unlock Interface (for The 2012 Chevrolet(r) Avalanche, Silverado, Suburban &

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Price: $159.98    

Product Feature

• PAC NU-GM4 NAVIGATION UNLOCK INTERFACE (FOR THE 2012 CHEVROLET(R) AVALANCHE, SILVERADO, SUBURBAN & T

Product Description

NAVIGATION UNLOCK INTERFACEALLOWS FACTORY NAVIGATION FEATURES OF RADIO OR REVERSE CAMERA TO BE USED BY PASSENGER AT ANY TIMEFOR THE 2012 CHEVROLET(R) AVALANCHE SILVERADO SUBURBAN & TAHOE & GMC(R) YUKON & SIERRAUPC : 606523109130Shipping Dimensions : 6.00in X 4.00in X 1.00inEstimated Shipping Weight : 0.5

Pac Nu-gm4 Navigation Unlock Interface (for The 2012 Chevrolet(r) Avalanche, Silverado, Suburban & Review

Interesting device that does what it claims it will: unlock the nav interface so the passenger can enter destinations while in motion as well as unlocking all scrolling functions. To use it you need to hold the steering wheel SRC button until a message is displayed in the DIC (driver information center), then hit it again to confirm safe usage. To disable, hit and hold the SRC button again until a DIC message indicates nav unlock terminated.

I have heard that it also allows the playing of a DVD on the nav display while in motion but I have never thought that was too sharp an idea. Regardless, I haven't tested it.

Installation was reasonably simple. Getting the dash bezel off the radio was a little scary because it seems easy to break. Pulling the radio out was easy now that GM has seen fit to include a few inches of extra wire on the radio harness as the expense of adding a few cents to the cost of goods. Unplugging older GM radio harnesses always required hands the size of ET's since they chintzed on the length of the harness.

In this application (2012 Suburban) the device harness is of high quality with good connectors to interface with the vehicle harness and backside of the radio. Two other wiring modifications are necessary:
1. a wire on the vehicle harness needs to be cut and the two ends connected to the device harness - not difficult but you need to pay attention to what you are doing since they have supplied bullet connectors that makes reverting to OEM easy. Not paying attention will result in failure to operate as designed and/or a little grief if you want to revert later to OEM specs (device removal).
2. a wire needs to be run from behind the radio to a harness on the left side under the driver side dash. Here is the ONLY fault in the product's quality I could find. The wire from the device should be about 3 feet longer so as not to require extension.

The biggest hassle I had was stuffing all the wires/connectors/harnesses back into the dash to the radio would reseat properly. With about 15 minutes of anguish and manipulation, it went back in properly. I ended up wrapping the device's box in a little bit of foam rubber and installing it between the center stack and the glove box with a 18" wire tie (my hands are too big for such small places to I used a longer tie that might be necessary ordinarily).

My only complaint is that while the device is engaged for unlocked navigation input, navigation is SUSPENDED. This is not that big a deal but I did ask the manufacturer about it and got a "deer stunned in the headlights" response that I couldn't get around. The documentation/install sheet does not mention this either. This becomes an issue if you have a route programmed and unlock the nav input function and forget to turn it off. You will eventually notice that the vehicle symbol is a mile or two off the road going in random directions and turn the device off. It will take 10-20 seconds for navigation to collect its thoughts, regain its cool, and resume.

I had been considering another similar device called the GM LOCKPICK but it was over twice the price with no discernible justification. Reviews indicated that engaging the LOCKPICK also stunned the navigation function.

One final thought: while speaking with the manufacturer I asked if there was a new model coming out soon that may have more feature/function. I was told no and that this device is being phased out (don't know about the plans of competing companies). Without actually admitting anything, I inferred that it might be potential legal liability that forcing this action. They cannot actually prohibit the driver from engaging the nav input and then fooling around with the nav system until they tail end someone or plant the front end of their vehicle into a large tree/house/bridge abutment. You can put all the warning labels on an icepick not to stick in ears/eyes/nose/skull but that won't stop the litigious bonehead from doing it. Plus there are a huge number of idle and bottom feeding lawyers eager to take a case like this. Suffice it to say that if you are interested in this sort of device, I wouldn't wait too much longer before ordering it. BTW, Amazon pricing was extremely competitive and beat everyone else hands down.

I would have rated this device 5 stars (I love it) if it didn't cause the nav system to go brain dead during its use.

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